The new AMD Radeon R7 and R9 series video cards went on sale this morning and a number of our readers have asked if they can enable AMD CrossFireX technology with their current AMD Radeon HD 7000 series card with them. The new AMD R-200 series is essentially a product re-brand, so the hardware is the same. AMD confirmed to use earlier this week that you would be able to run mixed CrossFire, but we wanted to try it out for ourselves and see how it works in the real world. Read on to see what worked and what did not!